His vocal effects were provided by Frank Welker.
Hayabusa is first seen at the film's opening, where he soars over the Great Wall of China, signaling his master and his army to attack. Though the Chinese soldiers manage to arrange a series of lit sentries to alert the Emperor of the Huns' presence, Hayabusa was more than thrilled to hear of it as Shan Yu was actually expecting the Emperor to learn of his army's arrival.
Hayabusa is later seen flying overhead as the Huns burn down a Chinese village, killing many people. There, Hayabusa collects a doll and gives it to Shan Yu, who analyzes the doll and realizes that the Imperial army awaits them in a small village located in the quickest passageway to the Imperial City.
The falcon joins Shan Yu and the Huns during the snowy mountain battle nearly stopping Mulan in her goal to defeat Shan Yu. However, Mulan sets a firework to create an avalanche, killing most of Shan Yu's warriors. Hayabusa escapes the avalanche and searches the snow for his master. Once found, Hayabusa settles down and joins the Huns in their trip to Imperial City, where Shan Yu holds the Emperor hostage. During a plan created by Mulan to stop Shan Yu, Hayabusa attempts to alert Shan Yu, but is burned by Mushu and used as a mode of transportation. It is unknown what happened to him after his master was killed by a firework explosion engineered by Mulan and Mushu.
In Kingdom Hearts
Being Shan Yu's sidekick, Hayabusa is very loyal and steadfast to his master, and happens to be as unpleasant, ruthless, and strict as him. He latches onto his prey or whatever he needs to carry with his steely talons that can be suitable for his fellow Hun masters (just like when he retrieved Shan Yu's sword when Shang almost handed it to the Emperor).